Fill-In After Reinjection of Tc-99m MAA
Year: 1998
Type: article
Study design: Case Report
Abstract: Combined pulmonary ventilation/perfusion (V/P) scintigraphy for assessing and monitoring pulmonary pathophysiology should be performed so that perfusion information exactly corresponding to ventilation can be obtained. An area of impaired V/P was shown in the affected lung of a patient with pneumothorax by combined pulmonary V/P scintigraphy. Additional combined pulmonary V/P scintigraphy following reinjection of Tc-99m MAA on a single maximal inspiration demonstrated improvement in both perfusion and ventilation The findings represent well-known pathophysiology. Hypoventilation causes reflex vasoconstriction of the pulmonary artery and when ventilation improves, so does perfusion. This suggests that a perfusion abnormality improved following pneumothorax.
Source: Clinical Nuclear Medicine
Authors: NAOYUKI WATANABE, NOBORU ORIUCHI, TETSUYA HIGUCHI, MASASHI YUKIHIRO, YUMI FUKUSHIMA, TSUNEO HIRANO, TOMIO INOUE, KEIGO ENDO
Institutions: Gunma University, Gunma University Hospital
Language: English
Subfield: Radiology, Nuclear Medicine and Imaging
Field: Medicine
Domain: Health Sciences
Open Access status: green
OpenAlex ID: W1986868114